期刊
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
卷 25, 期 9, 页码 1475-1481出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b922187e
关键词
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资金
- Department of Education, P.R. China [208056]
- Program of Science and Technology of Zhejiang Province, P. R. China [2007R10041]
- Zhejiang Normal University, Jinhua, Zhejiang Province, P. R. China
Laser ablation-spark induced breakdown spectroscopy (LA-SIBS), characterized by a developed high voltage fast pulse discharge spark, allows direct in-site analysis of non-conductive material without prior sample preparation. Currently laser induced breakdown spectroscopy (LIBS) permits qualitative analysis of a solid or liquid sample by ablating a tiny portion of it, then analyzing the resulting plasma. The LA-SIBS takes this a step further by employing a specifically designed high voltage and fast pulse discharge circuit to enhance plasma emission produced by laser ablation. In this article, LA-SIBS was used for optical emission spectroscopy of soil and compared with a single pulse (SP) LIBS technique. Except for great signal enhancement of plasma emission, the precision in terms of relative standard deviation (RSD) was generally improved by about 2 to 3 times. In addition, the signal to noise (S/N) ratio was improved by about 2 to 3 times as well. These characteristics will thereby probably benefit sensitivity for minor element analysis in most potential analytes. The signal enhancement with improved precision and S/N ratio on soil samples by LA-SIBS was demonstrated.
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